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| RQ-S75
RQ-S75
|
Mi SCHEMATIC DIAGRAM
1
2
3
4
:
Z
:
.
(See parts list on pages 25~727.)
e $304
: Stop (STOP) switch.
e VR1-1, VR1-2:
Volume adjustment VR.
e VR301 : Tape speed adjustment VR.
e DC voltage measurements are taken with electronics
voltmeter from negative terminal of battery.
No mark...Playback.
MAX...155mA
Volume VR beeen
e Signal line
aaapees : +8 linc, amp
: Playback signal.
O)
¢ BLOCK DIAGRAM
|
ee Jr i:
PLAYBACK
HE AD
TPI (2)
(L:OFF)
(8)
PRE
MUTE
IC |
LA4590WN-TFM
PRE/S-XBS/
POWER
AMP
2SB8ISB7TX
POWER SUPPLY
Q4
Q308,309
UN5215TX
UNS2I5TX
SWITCHING (LIVE)
SWITCHING
D
(FWO/REV)
<5
bos
Q322
UNSIIST X
O TP38(37)
LBIG74VTLM
POWER SUPPLY
MOTOR DRIVE
UNSIIMTX
TP35
MOTOR
DRIVE/
SOLENOID DRIVE
2
E
SS
Q300
HEADPHONES
Pepe
ee —
msce fie Cr 85L
PRE
| sort a COMMUTATING
Al
DRIVE
SW
/STARTING
45
(MECHANISM
{
a gate
DET. FWD/REV/STOP)
at
OT
4
x
°
2K(B)
MECHANISM
CONTROL
R360
VR3O!I
R356
4.7K
Q303
2SDI328STX
SOLENOID DRIVE
TAPE
ENDDET
e
TP33
Z|
iGo
— 16 —
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